The close_time field of the ledger version where this amendment most recently gained a majority.

In the amendment process, a consensus of validators adds a new amendment to the Majorities field using an EnableAmendment pseudo-transaction with the tfGotMajority flag when 80% or more of validators support it. If support for a pending amendment goes below 80%, an EnableAmendment pseudo-transaction with the tfLostMajority flag removes the amendment from the Majorities array. If an amendment remains in the Majorities field for at least 2 weeks, an EnableAmendment pseudo-transaction with no flags removes it from Majorities and permanently adds it to the Amendments field.

Note: Technically, all transactions in a ledger are processed based on which amendments are enabled in the ledger version immediately before it. While applying transactions to a ledger version where an amendment becomes enabled, the rules don't change mid-ledger. After the ledger is closed, the next ledger uses the new rules as defined by any new amendments that applied.

Amendments ID Format

The Amendments object ID is the hash of the Amendments space key (0x0066) only. This means that the ID of the Amendments object in a ledger is always:

7DB0788C020F02780A673DC74757F23823FA3014C1866E72CC4CD8B226CD6EF4

(Don't mix up the ID of the Amendments ledger object type with the Amendment ID of an individual amendment.)